Hello guys, first time poster here. I have an external hard drive with my MAME folder. As long as I start the emulator from that folder everything works perfectly. All 6,000 roms for the most part will play. When I point LaunchBox to the location of the emulator and the roms I get "error: unknown option" As you can see in the screenshot it is pointed to the correct location.
Screenshots
https://www.dropbox.com/s/c11df5stay4w29f/emulator details.jpg?dl=0
https://www.dropbox.com/s/ku3wkqw2412f9g2/associated platforms-1.jpg?dl=0